linux-kernel - [PATCH v3 0/3] acpi,memory-hotplug : implement framework for hot removing memory

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Date:	Fri, 26 Oct 2012 18:31:00 +0800
From:	wency@...fujitsu.com
To:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Cc:	liuj97@...il.com, len.brown@...el.com, akpm@...ux-foundation.org,
	kosaki.motohiro@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	rjw@...k.pl, laijs@...fujitsu.com,
	Wen Congyang <wency@...fujitsu.com>
Subject: [PATCH v3 0/3] acpi,memory-hotplug : implement framework for hot removing memory

From: Wen Congyang <wency@...fujitsu.com>

The patch-set implements a framework for hot removing memory.

The memory device can be removed by 2 ways:
1. send eject request by SCI
2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject

In the 1st case, acpi_memory_disable_device() will be called.
In the 2nd case, acpi_memory_device_remove() will be called.
acpi_memory_device_remove() will also be called when we unbind the
memory device from the driver acpi_memhotplug or a driver initialization
fails.

acpi_memory_disable_device() has already implemented a code which
offlines memory and releases acpi_memory_info struct . But
acpi_memory_device_remove() has not implemented it yet.

So the patch prepares the framework for hot removing memory and
adds the framework into acpi_memory_device_remove().

The last version of this patchset is here:
https://lkml.org/lkml/2012/10/19/156

Changelogs from v2 to v3:
  Patch2: rename lock to list_lock

Changelogs from v1 to v2:
  Patch1: use acpi_bus_trim() instead of acpi_bus_remove()
  Patch2: new patch, introduce a lock to protect the list
  Patch3: remove memory too when type is ACPI_BUS_REMOVAL_NORMAL
  Note: I don't send [Patch2-4 v1] in this series because they
  are no logical changes in these 3 patches.

Wen Congyang (2):
  acpi,memory-hotplug: call acpi_bus_trim() to remove memory device
  acpi,memory-hotplug: introduce a mutex lock to protect the list in
    acpi_memory_device

Yasuaki Ishimatsu (1):
  acpi,memory-hotplug : add memory offline code to
    acpi_memory_device_remove()

 drivers/acpi/acpi_memhotplug.c | 51 +++++++++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 10 deletions(-)

-- 
1.8.0

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